main.c

来自「这是LPC2300的例程 ZLG的ARM2300开发板带的」· C语言 代码 · 共 49 行

/****************************************Copyright (c)**************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name:			main.c
** Last modified Date:  2004-09-16
** Last Version:		1.0
** Descriptions:		The main() function example template
**
**------------------------------------------------------------------------------------------------------
** Created by:			Chenmingji
** Created date:		2004-09-16
** Version:				1.0
** Descriptions:		The original version
**
**------------------------------------------------------------------------------------------------------
** Modified by:			zhmj
** Modified date:		2006-12-1
** Version:				
** Descriptions:		本例使用LPC2300系列ARM的DAC输出正弦波
**                              程用户需要使用示波器观察P0.26波形
**
********************************************************************************************************/
#include "config.h"
volatile uint16 SinTable[45]={410,467,523,576,627,673,714,749,778,799,813,
819,817,807,789,764,732,694,650,602,550,495,438,381,324,270,217,169,125,87,
55,30,12,2,0,6,20,41,70,105,146,193,243,297,353};  //正弦表    
int main (void)
{
    uint32 i=0;
    
    PINSEL1 &= ( ~(0x03 << 20) );    // 先把第20、21位清零
    PINSEL1 = (0x02 << 20 );		 // P0.26连接到DAC的AOUT

						 		     // 不断的输出固定频率的正弦波形
    while(1)
    {
     for(i=0;i<45;i++)
     DACR = ( SinTable[i] << 6 );
    } 
		              
   // return 0;
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/